is it possible to enter the dream about a specific person/object right away? I read a lot about control in lucid dreams, but even without being lucid - is it possible to make something appear in your regular dream? Simply "thinking about it a lot" doesn't work so much, so I will be grateful if anyone shares any tips.

If thinking about something a lot (or doing something a lot in real life with the hope it will then start happening in dreams) hasnt made that thing start happening in a non Lucid dream.. I dont think you could do much to get it happening in a "non" lucid. You'll then I'd say need lucidity then to manifest something in your dream.

if you want to get something happening in your dreams you need to work at trying to have a LD.